1 Answer
1

Try Extend KSES, it seems to be exactly what you need (I haven’t tested it):

This plugin extends the HTML functionalify of the WordPress kses.php file, which states the allowable HTML that the post/page content editor will accept.
It allows the site administrator to check pre-defined HTML tags that can also be allowed via the editor. Tags include: object, embed, param, iframe, map and extensions have been added to the div and img tags.